Headlight



, May 10, 1927..

C. R. B. CLAFLIN HEADLIGHT Filed se t'. 18, 1924 I N VEN TORQ tures of embodiment of the invention which li atentecl May 10, 1927.

stares CHARLES R. B. CLAFLIN, OF EAST HARTFQRD, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE SIKO-LITE CORPORATION, OF MERIDEN, CONNECTICUT, A

CGRPOEATION OF CONNECTICUT.

HEADLIGHT.

Application filed September 18, 1924. Serial No. 738,551.

-. My invention relates to improvement in bulbs in head lights in which the rays of light are refracted anddissociated to prevent dazzling effect.

The main objectof -my invention to reduce glare of headlights without deduction in luminous flux of the projected beam.

My method is to render sections of the re fiector bright with dark spaces between. My principles are to* place reflecting material upon the bulb in such a manner that none of the direct rays from the filament are-visible; to place reflecting material upon the bulb in such a manner that it does not prevent the reflected rays from the reflecting material from reaching the reflector; to locate the filament at the spherical center of the bulb; to have the internally reflected rays of the bulb parallel the direct rays from the filament; to direct the rays from the filament that would he lost in the upper hemisphere into the projected beam of the reflector; to use high reflecting material.

l shoul note that the lamp is of particular advantage when used on automobiles. as

well as other purposes.

It is within bounds of poss1b1lity as may be inferred that some of the features of my invention can. be used with equal advantage. in other circumstances; l have a, number of;

other motives in view although my primary and principal object is to prevent sudden blindness against accident. 1

There are other features of novelt and advantage which will be discussed at ength in the followin description, wherein I will outline in' detail several of the many feal have selected for illustration in the drawings accompanying and forming a part of thresent specification.

1s disclosure is made to enable those skilled in the art to practice the invention;

am not restricted thereto, I may. obviously depart therefrom in many res ects Within the scope of the invention de ned b the claims following the said description. or as l have observed in eflect the invention comprises certain broad relations.

Referring to the said drawings: Fig. 1 is a front elevation of'the light;

head

Fig. 2 is the side elevation as seen from the rightof Fig. l with the-reflector in section;

Fig. 3 is a cross section of the bulb 3 on line A-.A;

Fig. 4 is the light bulb covered with refleeting material and one light opening;

Fig. -5 is a modification of the bulb 3 in Fig. 2;.

As shown the illuminator comprises in its makeup a .light .1 in the bulb 3 having attached thereto a reflecting material 4 and a reflector 2. These may be used in diflerent forms.

The primary featureis the reflecting material which I have illustrated and shown in each figure as 4. This material is laid upon or attached to the bulb or container 3 and may be composed of silver or other substance andcan be translucent or opaque, it may be protected with a secondary material or coating.

To prevent the direct rays from the primary light from being projected I have covterial on thebulb in alternating radial sections that the refracted rays may pass out of the bulb unobstructed as in Fi 3 dotted line B. I consider an important leature resides in the alternate sections of the reflecting material .4 and light transmitting spaces 6 around the bulb or lightcontainer as it prevents solid glare by diffusing the rays. Ans other important feature is covering the end of the bulb or container with reflecting ma terial which not only renders the, rimary light invisible but .also retracts-t le rays against the reflector which would be otherwise of little-use.

An important feature is the combinedutilization of the rays from the reflecting material on the bulb in conjunction with the primary light rays, as dotted lines B and C,

Fig. 3.

To fully utilize the retracting power of the bulb I prefer to deposit a brilliant reflecting niaterial'on the bulb as silver, but do not confine myself.

memes lBy covering the bulb in whole with refiectin material the rays of light are collected in mass and may be projected in one direction through an opening, as Fig. 4;.

, The dotted line C Fig. 2 illustrates the limit 01" the direct rays from the primary light upon the reflector.

What I claim is:

1. in a headlight bulb, a disk of reflecting material on the forward end thereof placed symmetrically with respect to the lon itudinal axis of the bulb, an odd number or' evenly spaced stripes extending back from said disk and parallel to said axis, each stripe being diametrically opposite a space between two such stripes, and a lighting filament.

2. In a headlight bulb, a disk of reflecting material on the forward end thereof symmetrically placed with respect to the longitudinal axis or": the bulb and covering but a limited portion or" the bulb, an odd number of evenly spaced stripes extendin back from said disk and parallel to sai axis, said stripes being slightly narrower than the spaces therebetween, and a light filament positioned at the longitudinal axis of the bulb.

3. As a new article of manufacture, a bulb for headlights having a disk of reflecting rnaterialapplied thereon at its forward end and symmetricall placed with respect to the longitudinal axis of the bulb, an odd number of evenly spaced stripes extending back from said disk parallel with said axis and applied in like manner as said disk, said stripes being slightly narrower than the spaces therebetween, and a lighting filament symmetrically placed with respect to said longitudinal axis.

anlln a headlight the combination of a bulb and a reflector, a reflector coating applied as a disk to the forward end of the bulb, said disk having reflecting arms extending back therefrom parallel to the longitudinal axis of the bulb, said arms ending at points diametrically opposite the outer edge of said-disk. o

5. In a bulb containing a lighting filament at its spherical center, sides or" the bulb coated with stripes of reflecting material parallel with the axis of the bulb, separated with clear spaces in which the center line 0' the stripes of reflecting materialis approximately 180 from the center line of the clear spaces, on the opposite sides.

6. In a headlight, the combination of a bulb and a reflector, the bulb coated on the end with reflecting material having arms oi": reflecting material extending on the sides nominally parallel with the axis or" the bulb with clear spaces between, said arms di ametrically opposite the clear spaces and out ed at the point diametrically opposite the outer edge of the reflecting end,

in testimony whereof I aflix my signature.

CHARLES lit. B. CLAFLEN. 

